Okie, do you have a detailed analysis and simulation available that corresponds with actual measurements?
Because Jobst Brandt analysis (and the OP's too) match very closely with actual measurements of spoke tension (using strain gauges) of a loaded wheel. So there is no reason whatsoever to doubt the numerical simulation nor the premise that it matters not whether spokes are under pre-compression (such as in a wooden-spoked wheel), no pre-stress at all (such as any plain disc wheel) or under tension (such as a metal wired spoke wheel).
Originally Posted by Burgoyne and Dilmaghanian
Tests show that the bottom spokes carry virtually all the load by compressive forces, which reduce the tensile prestress set up in the spokes when the wheel was made. The test results are compared with an analysis that considers the spokes as a disk which carries force in one direction only. This is shown to give good agreement, ...
Source
http://www-civ.eng.cam.ac.uk/cjb/papers/p20.pdf
You are just confused due to the pre-stressed spokes. The point is, that can safely be ignored. If the spokes wouldn't buckle under load, there would be no reason to tension them up, but since they are wires, they will buckle, so tension is needed to eliminate buckling. And just like many others, you are confused by the idea that tension somehow radically alters wheel theory.
So, unless you can show by measurement and analysis that this idea is wrong, your argument is entirely without merit.